I have a MVVM setup with GraphSource etc. as described in this example: http://docs.telerik.com/devtools/wpf/controls/raddiagram/populating-with-data/data-databinding
When I delete a node, the connecting edges are not getting deleted. I see this working in various other examples, but for me, the edges remain on the diagram. I found an old post from 2013 about this functionality not working, but I expect that in 2017, that bug has been fixed: http://www.telerik.com/forums/remove-connections-when-removing-node
Before I post more (code) details: Is the behavior expected to work? If yes, what's a good way to debug why edges are not getting correctly deleted for me?
1 Answer, 1 is accepted
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Accepted
Hello Matthias,
Thank you for contacting us.
Let me first start with that when you delete a shape item from the diagram its connection will not be deleted out of the box. You need to implement custom logic to delete shape connection when a shape is deleted. An approach which you could try is to override the DiagramCommands.Delete command and in its command handler, you can delete the shape and its connections. You can take a look at the Override Diagram Command help article in our documentation which describes how you can override diagram commands.
As for the forum post. The discussed behavior was related to undo command. In your case, you want to delete shape connections when a shape is deleted. This is not supported out of the box and you can achieve it using the custom code as mentioned above.
Regards,
Dinko
Progress Telerik
Thank you for contacting us.
Let me first start with that when you delete a shape item from the diagram its connection will not be deleted out of the box. You need to implement custom logic to delete shape connection when a shape is deleted. An approach which you could try is to override the DiagramCommands.Delete command and in its command handler, you can delete the shape and its connections. You can take a look at the Override Diagram Command help article in our documentation which describes how you can override diagram commands.
As for the forum post. The discussed behavior was related to undo command. In your case, you want to delete shape connections when a shape is deleted. This is not supported out of the box and you can achieve it using the custom code as mentioned above.
Regards,
Dinko
Progress Telerik
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